The degrees of temperature Californians measure the climate in. Because they live in such a warm place, they become cold at unusually high temperatures. Thus, when converted to degrees Cali, 47 degrees Fahrenheit is 32 degrees Cali, 60 degrees Fahrenheit is 45 degrees Cali, etc. However, once you get to about 75-100 degrees Fahrenheit, the conversion stays the same.

"Omg it's so cold right now."
*looks at phone* "it's 47degrees"
"That's sooooo cold!"
"It's like freezing in the midwest and east coast right now..."
"It's freezing HERE right now!"
"Yeah I guess it is in degrees Cali"